element
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Information about Astatine-209:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 208.986159 | ± | 0.000009 | amu |
| Excess Mass (Δ): | -12.893106 | ± | 0.007920 | MeV |
| Binding Energy: | 1633.299534 | ± | 0.007925 | MeV |
| β- Decay Energy: | -3.929000 | ± | 0.028284 | MeV |
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra,
Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
Radioactive Decay Data:
- Spin: 9/2-
- Half life: 5.41 h ( 19476 sec., λ = 3.55898×10-05 s-1)
- Mode of decay:
E.C. to
(Q = 3.486 MeV)
Branch ratio: 95.90 %
- Mode of decay:
α to
(Q = 5.757 MeV)
Branch ratio: 4.10 %
- Possible parent nuclides:
- E.C. from
- α from
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| 1428 | 26 ns | 21/2- | | +10.0(2) | | | | | TDPAD | PR C14 1023 (76) |
| | | | 9.5(2) | | | | | TDPAD | DisA 37 408C (77) |
| | | | | | 0.78(8) | | [211At 2641] | TDPAD | PL 122B 27 (83) |
| 2429 | 890 ns | 29/2+ | | 15.38(14) | | | | | TDPAD | HFI 34 47 (87) |
| | | | | | 1.50(15) | | [211At 2641] | LEMS | PR C43 2566 (91) |
| | | | | | 1.50(15) | | [211At 2641] | TDPAD | PL 122B 27 (83) |
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N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.
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